Booster with detectable boost operation
US5023930A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 16, 1988 |
| Grant date | Jun 11, 1991 |
| Priority date | — |
| Expiry date | May 16, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W16/26
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An apparatus and method for selecting a number of cellular radio channels to be boosted in a given geographical area provides either F1-F1 or F1-F2 operation. The signals can be boosted at the same frequency with input to output isolation being achieved by the use of directive transmit and receive antennas physically positioned to achieve sufficient isolation. Each signal is individually filtered, amplified, and recombined for transmission. Any number of signals may be accommodated depending upon the number of retransmission channels available. Apparatus is also provided to retransmit a signal at a different frequency from that at which it is received. A tag, typically an audio tone or diminished signal amplitude gap, may be selectively applied to boosted retransmitted signals in order that they may be recognized as such.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.